I ordered 6 pcs. of which only 2 worked out of the box. Four had components either dropped off the board already at arrival or during handling and assembly. I managed to solder them back on the board and three where back in business, however the last has a "heavy load ~25 ohm" at the output of the MAX8903A LiPO so no luck here. I can't find the short so probably a defective component or some short underneath a component - given up. I think the product and function is great, but soldering quality is terrible. I adjusted the max charging current Ichg as well as the Iin according to the datasheet of the MAX8903A, since the resistor value calculations wasn't in the product documentation.
Response from ceech | July 4, 2019
There was a bad temperature sensor in my soldering station. I had it replaced. If you have any faulty boards, I will replace them. Free of charge. I apologize.